MA5006 MPOWER | Alldatasheet
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Technical content
1A, 1.2MHz Low Noise Sync. Buck Converter GENERAL DESCRIPTION The MA5006 is a monolithic synchronous buck converter with built -in internal power MOSFETs. It achieves 1A continuous output current, fixed switching frequency with excellent load regulation and line regulation. Current mode operation provides extremely fast transient response and eases of loop stabilization. Fault condition protection includes cycle -by-cycle current limiting, output short circuit protection and thermal shutdown. In shutdown mode the regulator draws less than 1μA of supply current. Internal soft-start minimizes the inrush supply current at initial startup. The MA5006 requires a minimum number of readily available standard external components. It is available in SOT23-5L and TSOT23-5L package. FEATURES - 2.7V to 5.5V Input Voltage Range. - Up to 1A Output Current. - 300/200mΩ Internal Power MOSFET Switches. - Up to 95% Efficiency. - 40μA Typical Quiescent Current. - Less than 1μA Shutdown Current. - 1.2MHz Switching Frequency. - Internal Compensation and Stable with Low ESR Ceramic Capacitors. - Internal Build-in Soft-Start Function. - Thermal Shutdown Protection. - Current Limit Protection. - Short-Circuit Protection. - Output Adjustable from 0.6V to VIN. - Available in SOT23-5L and TSOT23-5L Pb-Free Package. APPLICATION CIRCUIT VIN 2.7V to 5.5V 10uF VIN 2.2uH MA5006 GND SW 10uFFB 450kΩ 100kΩ 3.3nF VOUT 3.3V ENONOFF OUT FB FB R1V = V x 1+ , V =0.6V, 60K R2 300KR2
PIN ASSIGNMENT The packages of MA5006 are SOT23-5L and TSOT23-5L. The pin assignment is given by: 1 2 3 SOT23-5L TSOT23-5L FB VIN SWGNDEN (Top View ) Name Description EN Chip Enable pin. Active high. Internal pull high. GND Ground Pin. SW Switching Pin. VIN Power Input Pin. FB Feedback Pin. ORDER / MARKING INFORMATION Order Information (SOT, TSOT) Top Marking (SOT, TSOT) MA5006 XX X Package Type Packing Blank : Bag A : Taping B: SOT23-5L BT: TSOT23-5L B Week: 01~26(A~Z) 27~52(a~z) Year : 3 = 2013 4 = 2014 ID Code: Internal2 Y W X BLOCK DIAGRAM PWM CONTROL LOGIC OSCILLATOR COMP ILIMIT EA REFERENCE and BIAS Soft- Start UVLO POR 0.6V P- SWITCH EN FB GND SW VIN ISEN Thermal Shutdown Driver